AZ DISPLAYS SPECIFICATIONS FOR LIQUID CRYSTAL DISPLAY CUSTOMER APPROVAL AZ DISPLAYS ENGINEERING APPROVAL

Transcription

1 AZ DISPLAYS SPECIFICATIONS FOR LIQUID CRYSTAL DISPLAY CUSTOMER APPROVAL PART NO. : ACM2002E-FL-GBW(AZ DISPLAYS) VER 1.0 COMPANY APPROVAL CHOP CUSTOMER COMMENTS AZ DISPLAYS ENGINEERING APPROVAL DESIGNED BY CHECKED BY APPROVED BY Jacky Liuhang GU

2 REVISION RECORD REVISION REVISION DATE PAGE CONTENTS VER FIRST ISSUE AZ DISPLAYS 1

3 CONTENTS 1.0 GENERAL SPECS 2.0 ABSOLUTE MAXIMUM RATINGS 3.0 ELECTRICAL CHARACTERISTICS 4.0 OPTICAL CHARACTERISTICS 5.0 BLOCK DIAGRAM 6.0 PIN ASSIGNMENT 7.0 POWER SUPPLY 8.0 TIMING CHARACTERISTICS 9.0 MECHANICAL DIAGRAM 10.0 RELIABILITY TEST 11.0 DISPLAY INSTRUCTION TABLE 12.0 STANDARD CHARACTER PATTERNS 13.0 PRECAUTION FOR USING LCM AZ DISPLAYS 2

4 1.0 GENERAL SPECS 1. Display Format 20*2 Character 2. Power Supply 5.0V(Single power supply without DC-DC,adjustable Vop) 3. Module Outline Dimension 116.0mm(W) x 37.0mm(H) x max 14.0mm(D) 1. Viewing Area(W*H) 83.0mm(W) x 18.6mm(H) 2. Dot Size (W*H) 0.60mm(W) x 0.65mm(H) 3. Dot Pitch (W*H) 0.65mm(W) x 0.70mm(H) 4. Character Size (W*H) 3.20mm(W) x 5.55mm(H) 5. Character Pitch (W*H) 3.70mm(W) x 5.95mm(H) 6. Viewing Direction 6:00 O Clock 7. Driving Method 1/16Duty,1/5Bias 8. Control IC ST7066U-0A or compatible 9. Display Mode STN(GRAY)/ Positive / Transflective 10. Backlight Yellow-Green LED/Bottom 11. Operating Temperature -20ºC ~ 70ºC 12. Storage Temperature -30ºC ~ 80ºC 13. RoHS RoHS compliant 2.0 ABSOLUTE MAXIMUM RATINGS Item Symbol Min Typ Max Unit Operating temperature Top ºC Storage temperature Tst ºC Input voltage Vin Vss Vdd+0.3 V Supply voltage for logic Vdd- Vss V Supply voltage for LCD driving Vdd- V V 3.0 ELECTRICAL CHARACTERISTICS 3.1 Electrical Characteristics Of LCM Item Symbol Condition Min Typ Max Unit Power Supply Voltage Vdd 25ºC V Power Supply Current Idd Vdd=5.0V, fosc=270khz ma Input voltage (high) Vih Pins:(E,RS,R/W,DB0-DB7) Vdd V Input voltage (low) Vil VDD=5V V -20ºC Recommended LC Driving Voltage Vdd V0 25ºC V 70ºC AZ DISPLAYS 3

5 3.2 The Characteristics Of LED Backlight Electrical-Optical Characteristics Of LED Backlight (Ta=25ºC) Item Symbol Condition Min Typ Max Unit Forward Voltage (1) Vf If=140mA (5) V Reverse Voltage Vr V Luminance (2) Lv If=140mA cd/ m2 Uniformity (3) Δ (Lvmin/Lvmax)% 70% Peak wave length λp If=140mA nm Lifetime (4) - If=140mA Hours NOTE: (1) Forward voltage means voltage applied directly to the LED, please refer to the backlight diagram. (2)The luminance is the average value of 5 points, The measurement instrument is BM-7 luminance colorimeter. The diameter of aperture is Φ5mm (3) Luminance means the backlight brightness without LCD. (4) Backlight lifetime means luminance value larger than half of the original after hours continuous working. (5) Please apply the backlight current as the table recommend. If LCM surface luminance is acceptable, please apply the driving current as lower as possible. Any time, do not apply the driving current higher than 160mA Backlight Control Circuit for LCM(2x14=28 pcs LED) 15(BL+) R=6.8Ω Vf 16(BL-) LED Typical Electro-Optical Characteristics Curve(for single led) 1. Forward current vs. Ambient temperature 2. Forward current vs. Forward voltage AZ DISPLAYS 4

6 4.0 OPTICAL CHARACTERISTICS (Ta=25ºC) Item Symbol Condition Min Typ Max Unit Viewing angle (Left - right) θ2 Cr deg Viewing angle (Up-down) θ1 Cr deg Contrast Ratio Cr θ1=0, θ2= Response time (rise) Tr θ1=0, θ2= ms Response time (fall) Tf θ1=0, θ2= ms (1). Definition of Optical Response Time (2). Definition of Contrast Ratio (3). Definition of Viewing Angle θ2 and θ1 AZ DISPLAYS 5

7 5.0 BLOCK DIAGRAM 1.VSS 2.VDD 3.VO 4.RS 5.R/W 6.E 7.DB0 ~~ 14.DB7 8 U1 COM U2 SEG SEG SEG1 SEG100 COM1 16 LCD20X2 COM BL+ 6.8Ω 16. BL- LED BACKLIGHT AZ DISPLAYS 6

8 6.0 PIN ASSIGNMENT Pin No. Symbol Function 1 Vss Ground 2 Vdd +5.0V 3 Vo LCD contrast adjust 4 RS Register select 5 R/W Read / Write Signal 6 E Enable Signal 7 DB0 Data bit 0 8 DB1 Data bit 1 9 DB2 Data bit 2 10 DB3 Data bit 3 11 DB4 Data bit 4 12 DB5 Data bit 5 13 DB6 Data bit 6 14 DB7 Data bit 7 15 BL+ Power Supply for BL+ 16 BL- Power Supply for BL- 7.0 POWER SUPPLY Vdd LCD MODULE V0 VR 10K-20K Vdd Vss AZ DISPLAYS 7

9 8.0 TIMING CHARACTERISTICS Write mode (Writing Data from MPU to ST7066U) Read mode (Reading Data from ST7066U to MPU) For more details, please refer to IC specification. AZ DISPLAYS 8

10 9.0 MECHANICAL DIAGRAM F E D C B A Unspecified Tolerance:±0.2mm REV ECN NO NATURE OF MODIFICATION CN/DATE FIRST ISSUED DISPLAY PATTERN REV A SH NO 1/1 7 8 F E D C B A AZ DISPLAYS 9

11 10.0 RELIABILITY TEST NO Test Item Description Test Condition Remark Applying the high storage 1 High temperature 80 ºC temperature Under normal humidity for a storage 96hrs long time Check normal performance Environmental Test Low temperature storage High temperature Operation Low temperature Operation High temperature/high Humidity Storage 6 Temperature Cycle 7 8 Mechanical Test 9 Other Vibration test(package state) Shock test(package state) Applying the low storage temperature Under normal humidity for a long time Check normal performance Apply the electric stress(voltage and current) Under high temperature for a long time Apply the electric stress Under low temperature for a long time Apply high temperature and high humidity storage for a long time Apply the low and high temperature cycle -30ºC<>25ºC<>80ºC <>25ºC 30min 10min 30min 10min 1cycle Check normal performance Applying vibration to product check normal performance Applying shock to product check normal performance -30ºC 96hrs 70 ºC 96hrs -20ºC 96hrs 90% RH 40ºC 96hrs -30ºC/80ºC 10 cycle Freq:10~55~10Hz Amplitude:0.75mm 1cycle time:1min X.Y.Z every direction for 15 cycles Drop them through 70cm height to strike horizontal plane Note1 Note1 Note2 Note2 Remark Note1:Normal operations condition (25ºC±5ºC). Note2:Pay attention to keep dewdrops from the module during this test. AZ DISPLAYS 10

12 11.0 DISPLAY INSTRUCTION TABLE AZ DISPLAYS 11

13 12.0 STANDARD CHARACTER PATTERNS Note: The character generator RAM is the RAM with which the user can rewrite character patterns by program. AZ DISPLAYS 12

14 13.0 PRECAUTION FOR USING LCM 1. When design the product with this LCD Module, make sure the viewing angle matches to its purpose of usage. 2. As LCD panel is made of glass substrate, Dropping the LCD module or banging it against hard objects may cause cracking or fragmentation. Especially at corners and edges. 3. Although the polarizer of this LCD Module has the anti-glare coating, always be careful not to scratch its surface. Use of a plastic cover is recommended to protect the surface of polarizer. 4. If the LCD module is stored at below specified temperature, the LC material may freeze and be deteriorated. If it is stored at above specified temperature, the molecular orientation of the LC material may change to Liquid state and it may not revert to its original state. Excessive temperature and humidity could cause polarizer peel off or bubble. Therefore, the LCD module should always be stored within specified temperature range. 5. Saliva or water droplets must be wiped off immediately as those may leave stains or cause color changes if remained for a long time. Water vapor will cause corrosion of ITO electrodes. 6. If the surface of LCD panel needs to be cleaned, wipe it swiftly with cotton or other soft cloth. If it is not still clean enough, blow a breath on the surface and wipe again. 7. The module should be driven according to the specified ratings to avoid malfunction and permanent damage. Applying DC voltage cause a rapid deterioration of LC material. Make sure to apply alternating waveform by continuous application of the M signal. Especially the power ON/OFF sequence should be kept to avoid latchup of driver LSIs and DC charge up to LCD panel. 8. Mechanical Considerations a) LCM are assembled and adjusted with a high degree of precision. Avoid excessive shocks and do not make any alterations or modifications. The following should be noted. b) Do not tamper in any way with the tabs on the metal frame. c) Do not modify the PCB by drilling extra holes, changing its outline, moving its components or modifying its pattern. d) Do not touch the elastomer connector; especially insert a backlight panel (for example, EL). e) When mounting a LCM makes sure that the PCB is not under any stress such as bending or twisting. Elastomer contacts are very delicate and missing pixels could result from slight dislocation of any of the elements. f) Avoid pressing on the metal bezel, otherwise the elastomer connector could be deformed and lose contact, resulting in missing pixels. 9. Static Electricity a) Operator Ware the electrostatics shielded clothes because human body may be statically charged if not ware shielded clothes. Never touch any of the conductive parts such as the LSI pads; the copper leads on the PCB and the interface terminals with any parts of the human body. b) Equipment There is a possibility that the static electricity is charged to the equipment, which has a function of peeling or friction action (ex: conveyer, soldering iron, working table). Earth the equipment through proper resistance (electrostatic earth: 1x10 8 ohm). Only properly grounded soldering irons should be used. If an electric screwdriver is used, it should be well grounded and shielded from commutator sparks. The normal static prevention measures should be observed for work clothes and working benches; for the latter conductive (rubber) mat is recommended. c) Floor Floor is the important part to drain static electricity, which is generated by operators or equipment. There is a possibility that charged static electricity is not properly drained in case of insulating floor. Set the electrostatic earth (electrostatic earth: 1x10 8 ohm). d) Humidity Proper humidity helps in reducing the chance of generating electrostatic charges. Humidity should be kept over 50%RH. e) Transportation/storage The storage materials also need to be anti-static treated because there is a possibility that the human body or storage materials such as containers may be statically charged by friction or peeling. The modules should be kept in antistatic bags or other containers resistant to static for storage. f) Soldering Solder only to the I/O terminals. Use only soldering irons with proper grounding and no leakage. Soldering temperature : 280 C ± 10 C Soldering time: 3 to 4 sec. AZ DISPLAYS 13

15 Use eutectic solder with resin flux fill. If flux is used, the LCD surface should be covered to avoid flux spatters. Flux residue should be removed afterwards. g) Others The laminator (protective film) is attached on the surface of LCD panel to prevent it from scratches or stains. It should be peeled off slowly using static eliminator. Static eliminator should also be installed to the workbench to prevent LCD module from static charge. 10. Operation a) Driving voltage should be kept within specified range; excess voltage shortens display life. b) Response time increases with decrease in temperature. c) Display may turn black or dark blue at temperatures above its operational range; this is (however not pressing on the viewing area) may cause the segments to appear fractured. d) Mechanical disturbance during operation (such as pressing on the viewing area) may cause the segments to appear fractured. 11. If any fluid leaks out of a damaged glass cell, wash off any human part that comes into contact with soap and water. The toxicity is extremely low but caution should be exercised at all the time. 12. Disassembling the LCD module can cause permanent damage and it should be strictly avoided. 13. LCD retains the display pattern when it is applied for long time (Image retention). To prevent image retention, do not apply the fixed pattern for a long time. Image retention is not a deterioration of LCD. It will be removed after display pattern is changed. 14. Do not use any materials, which emit gas from epoxy resin (hardener for amine) and silicone adhesive agent (dealcohol or deoxym) to prevent discoloration of polarizer due to gas. 15. Avoid the exposure of the module to the direct sunlight or strong ultraviolet light for a long time. The brightness of LCD module may be affected by the routing of CCFL cables due to leakage to the chassis through coupling effect. The inverter circuit needs to be designed taking the level of leakage current into consideration. Thorough evaluation is needed for LCD module and inverter built into its host equipment to ensure specified brightness. AZ DISPLAYS 14